Levels of CO2 concentration in the outside air are around 400 ppm (parts per million). In a typical classroom (volume 150 m3) occupied by 25 students, the CO2 concentration can rise to 2300 ppm in one hour of class without adequate ventilation. Understanding if the indoor ventilation is adequate is therefore very important.
CO2 concentration is an easily measurable and continuously monitored parameter, compared to other parameters (e.g. formaldehyde) that require complex and expensive measuring instruments and methods.
The purpose of the tool is to allow the school manager to calculate the probable CO2 concentration in the classroom as a function of some key parameters (indoor and outdoor temperature, number of children, number of open windows, how and for how long) and to get suggestions to improve the management of natural ventilation.
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